im currently obsessing over striding games, like set up a 3 1/2 stride and collect for the 4, or stretch for the 3.
Set up a dressage pattern(figure-8, serpintine, even a circle) and add jumps to it, really helped my horse listen and made me take dressage more seriously, because if my circle wasnt just right, my jump wasnt.
Pole courses, pole courses, pole courses!!! Good for days when you don't want to push and jump lots, but can still work with courses.
Take away something. Saddle/riens/hands/stirrups... so much fun!
Theres always gymnastics. Always. Endless options.
Take it cross-country!!! Change of scenery, change of jumps(:
Have fun, looking foreward to see what everyone else says!